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Inline Check and Relief/Check Valves
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Inline Check and Relief/Check Valves



   These spring-operated poppet valves, with optional relief settings, allow free flow in only one direction and prevent backflow – sometimes referred to as “backflow preventor”, “flow stop”, or “non-return” valve. They also are used for relief and by-pass functions; however, they should not be used as safety relief valves. Kepner's Flexible Seal Seat? combines metal-to-metal contact with a resilient seal seat ensuring dependable bubble-tight shutoff of liquid or gas, and long service life. Standard and specialty valve designs handle a wide variety of applications.








Features and Benefits:
?Flexible Seal Seat? for zero leak (bubble-tight) seal at low and high pressures
?O-Ring seal positively secured
?Non-pressurized threads
?Poppet stop inside valve body prevents spring from bottoming out
?Generous flow passages allow full flow with minimal pressure drop



Standard Valve Specifications:
? See Applications for selection/ limitation notes about O-Ring and Valve materials
? End Connections: Pipe or Tube (NPT, JIC; 12 combinations)
? Port Sizes: 1/8 inch to 3 inch (3.2 mm to 76 mm)
? Body Materials: Aluminum, Brass, Steel, 303 or 316 Stainless Steel
? O-Ring Seals: Buna-N, Neoprene, Viton?, EP, others available
? Temperature: -300°F to 450°F (-184°C to 232°C), O-Ring dependent
? Check Crack Pressure: 1 to 2 PSI (.07 bar to .14 bar)
? Relief/Check Crack Pressures: 5 PSI (.35 bar), 10 PSI (0.7 bar), 25 PSI (1.7 bar), 50 PSI (3.5 bar) and 65 PSI (4.5 bar), others available
? Operating Pressure: to 3000 PSI (207 bar)
? Flow: to 500 GPM (1893 LPM).




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